Engine-cooling device.



G. S. JACOBS.

ENGINE COOLING DEViCE.

APPLICATION man APR-30, 1913.

' ncense. I

enonen s. moons, or nerozarn, INDIANA, ASSIGNOB, BY

MESNE ASSIGNMENTS, TO

EINLEY I. MOUNT.AS REGEIVER OF M. RUMELY CO MPANYQ ENGINE-(100L116 G DEVICE.

' Specification of Letters Patent.

Eatented May 11, 19155.

Application filed; April 80, 1913. Serial No. 764,542.

To all whom it may concern:

Be it known that I, GEORGE S. JAooBe, a citizen .of the United States, residing at Laporte, in the county of Laporte and State of Indiana, have invented certain new and useful Improvements in Engine-Cooling Devices, of'which the following is a specification.

My present invention relates to cooling devices for the cylinders and other heated parts of internal combustion engines, and

has; reference more particularly to that type of cooling devices wherein the engine is cooled by circulating a fluid in a jacket around the cylinders and other heated parts,

and thenceIeithe'r directly or through. suitable pipes to'a radiator or cooling toweror other cooling device where the heat is abstracted, the circulation being a closed one and the fluid returned to the cylinder jacket to repeat the cooling function.

It is a fact suggested by theory and verifled by experiment that the only practical way to abstract heat from the fluid in a closed circuitc'ooling device is by the circulation of another cooler fluid (preferably I air) through the radiator or other cooling device where it comes in contact either di, rectly with the hot fluid from'the cylinder jacket or elsewith the walls f the pipes "or." i. 1 I abstaining thehot fluid ab heat therefrom in accordance with Newtons law of cooling, after which it must be ejected and replaced by more cooler fluid. It has been found in practice that the amount of heat lost by direct radiation is practically negligible, and that it is necessary to induce'a secondary circulation of a relatively'cooler fluid as above stated to re. {move the heat from the hot fluid.

It has been found practicable, in one form of cooling'apparatus, to effect this secondary circulation in the case of air by employing the exhaust of the engine. in. a suitable stack] connected with the radiator, brother-cooling; device; and 1 my, present; invention relates" particularly to an impmyenient thattype. of apparatus employing the xhaust in.v the I case otmultiple cylinder engrnea :n." .7

one

manifold into one common exhaust pipe which was led into the stack of the cooling device, where it induced a'draft of cooling air which flowed through the cooling'device as a Whole- I I I have established by experiment that in I the case of multiple cylinder engines a much better air circulation and consequently better cooling effect can be established by dividing the stack, or both the stack and the cooling device, into. sections or compartments, each section of the stack setting either the entire cooling "device or a' corresponding section of the cooling device. In this case the exhausts of the several cylinders are not led into a cominon exhaust.

nection with the accompanying drawing showing one practical application thereof, and in which- Figure 1 is a vertical section through the cylinders and jaclgetpiaiouecylinderfiigine andthe radiator thereof, showing my present improvement applied thereto. Fig.

2 is a top plan view of the radiator shown in Fig. 1. Fig. 3 is a vertical sectional ;view of a radiator construction wherein only the stack is divided. I I

Referring first to Figs. 1 and 2, 5 designates the cylinders and tithe pistons'of a four-cylinder internal combustion engine, said cylinders-being inclosed in a waterjacket 7. I 8 designates'as awhole a radiator, or jacket water cooling device, herein jsh own serrate s said "groilp,

t rrents 9W as comprising a plurality ,offzig'zagpipejacket 7 to one end of the water circulation system of the radiator, and 13 designates the return pipe leading from the other end of the Water circulation system of the radiator back to the jacket.

In the form of the invention shown in 'Figs. 1 and theradiator 8'15 divided by transverse central partitions 14 and 15 extending from top to bottom thereof into four equal compartments, and these partitions are extended upwardly through the hood ll, as shown at 14* and 15. I

Leading from the exhaust ports 16 of the 'four engine cylinders are four exhaust pipes exhaust of each cylinder. The greater eificiency of the described arrangement is due, as 'I believe, to the fact that, by creating separate exhausts through individual or separate parts or sections of the radiator, a greater amount of air can be circulated through the radiator, and consequently a greater amount of heat abstracted from the hot fluid, than in the present known arrangement wherein the exhausts occur with much greater frequency and each affects the entire radiator. In the arrangement illustrated it will be manifest that the exhaust actions in each compartment have only onefourth the frequency that the exhaust actions would have if transmitted through a single pipe or nozzle within the stack from a manifold; and this decreased frequency is, within certain limits, more efiicient than the high frequency exhausts. L

In Fig. 3 I show a modification wherein the radiator 8 is not partitioned, but the stack 11 alone is provided with the cen tral transverse partitions l4 and 15 extending from the top of the stack down to approximately the upper ends of the water circulation pipe sections 9. In this form of the invention each exhaust from any of the nozzles 18' induces an upward flow of air through the entire cross-section of the radiator, but such upward flow'is more pronounced, of course, through that region directly underlying the nozzle through which the exhaust occurs.

Although I have herein shown the radiator stack as divided into as many compartments as there are cylinders or units in the engine, with the exhaust from each cylinder leading into one of thefcompartments, I

do not confine my invention, in its broadest aspects, to constructions wherein the stack, or the stack and underlying cooling device, are divided into exactly as many compart ments as there a/rc engine cylinders or units, since it-sofnetimcs happens that abetter efficiency can be secured by the employment of a less number of compartments, combining the exhausts of two or more cylinders to serve each compartment. Furthermore, as shown in Fig. 3, I do not limit the invention in all cases'to the presence of actual physical partitions in the cooling device itself, since frequently the construction of the cooling device is such that the use of partitions in the stack alone is suiiicient to largely limit the circulation induced by a particular section of the stack to the particular region of the cooling device it is designed to serve.

I claim-- 1. In an engine cooling device, the combination with the cylinders and coolingjacket of a multiple cylinder engine, of a cooling device connected with said cylinderjacket and provided with air-circulating passages, a stack containing a plurality of compartments equal in number to the number of cylinders in free communication with the air-circulating passages of said cooling device, and an exhaust pipe leading from each of said cylinders into only one of said compartments.

2. In an engine cooling device, the combination with the cylinders and coolingjacket of a multiple cylinder engine, of a radiator containing liquid and air-circulat ing passages, pipes connecting said jacket and liquid circulating passages of said radiator, a stack containing a plurality of compartments in free communication with the air-circulating passages of said radiator, and a separate exhaust pipe leading from eachof said cylinders into one only of said compartments.

3. In an engine cooling device, the combination with the cylinders and cooling jacket of a multiple cylinder engine, of a radiator provided with air-circulating passages, partitions in said radiator forming a plurality of compartments dividing the aircirculating passages of the radiator, a stack divided into a corresponding plurality of compartments each communicating with a. compartment of the radiator, and separate exhaust pipes each leading from each of said cylinders into one of the compartments of said stack.

i. In engine cooling device, the combination with the cylinders and cooling jacket of a multiple cylinder engine, of a radiator provided with air circulating passages, partitions in said radiator forming a plurality of compartments dividing the aircirculating passages of the radiator, a suseparate exhaust pipe from each ofthe-cylperposed stack containing partitions 10- inders of the engine each leading into one of cated in the same vertical planes as. the parthe compartments of'said stack. V titi ons ofthe radiator and dividing said GEO. S. JACOBS. 5 stack into a'corresponding'plurality of com- Witnesses:

partments, each communicating with an un-. MATE G. LINE, derlying compartment of the radiator, and a EDITH ZACH. 

